The actual incentive that they have should ideally be actual political activism that exercises some real and material form of leverage against their power. Seeing as these movements have all been totally deconstructed, mostly by the federal government, instead, you’ll find that the way you’re supposed to change the party is just by voting harder for them, and then just kind of hoping that they somehow naturally decide to swing left, after you’ve already handed them the keys to the kingdom. It’s pure cope, basically.